Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify ftrace_direct_multi_init() assigns kthread_run()'s return value to simple_tsk without an IS_ERR() check. When kthread_run() fails it returns ERR_PTR(-ENOMEM), but init still returns 0, so the module loads with simple_tsk holding an error pointer. On unload, ftrace_direct_multi_exit() then passes that ERR_PTR to kthread_stop(), leading to a null-pointer-dereference. Check the return value of kthread_run() with IS_ERR(); on failure, unregister the ftrace direct call and propagate the error code.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e1067a07cfbc5a36abad3752fafe4c79e06db1bb before 7a96b9f6d5ba23dbce66c8a4a242effd4c01a830; affected e1067a07cfbc5a36abad3752fafe4c79e06db1bb before 98b7b2a29ae87937aa02ab9391543ef8c602cd94; affected e1067a07cfbc5a36abad3752fafe4c79e06db1bb before 626614df9080d7052fbe24dc90b5434717ab7a9f; affected e1067a07cfbc5a36abad3752fafe4c79e06db1bb before cf839636911d8313f3ecd098329fd0b96499e4cf; affected e1067a07cfbc5a36abad3752fafe4c79e06db1bb before 6727b7618f49401acf373fa3ec5712e2ec52e5cf |
| Linux / Linux | affected 5.16; unaffected 0 before 5.16; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/7a96b9f6d5ba23dbce66c8a4a242effd4c01a830
- https://git.kernel.org/stable/c/98b7b2a29ae87937aa02ab9391543ef8c602cd94
- https://git.kernel.org/stable/c/626614df9080d7052fbe24dc90b5434717ab7a9f
- https://git.kernel.org/stable/c/cf839636911d8313f3ecd098329fd0b96499e4cf
- https://git.kernel.org/stable/c/6727b7618f49401acf373fa3ec5712e2ec52e5cf